package com.cloudkinto.common.utils;

import cn.afterturn.easypoi.excel.ExcelExportUtil;
import cn.afterturn.easypoi.excel.ExcelImportUtil;
import cn.afterturn.easypoi.excel.entity.ExportParams;
import cn.afterturn.easypoi.excel.entity.ImportParams;
import cn.afterturn.easypoi.excel.entity.enmus.ExcelType;
import org.apache.commons.lang3.StringUtils;
import org.apache.poi.ss.usermodel.Workbook;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.http.HttpServletResponse;
import java.io.*;
import java.net.URLEncoder;
import java.util.List;
import java.util.Map;
import java.util.NoSuchElementException;

public class ExcelUtils {
    /**
     * excel 导出
     *
     * @param list           数据
     * @param title          标题
     * @param sheetName      sheet名称
     * @param pojoClass      pojo类型
     * @param fileName       文件名称
     * @param isCreateHeader 是否创建表头
     * @param response
     */
    public static void exportExcel(List<?> list, String title, String sheetName, Class<?> pojoClass, String fileName, boolean isCreateHeader, HttpServletResponse response) throws IOException {
        ExportParams exportParams = new ExportParams(title, sheetName, ExcelType.XSSF);
        exportParams.setCreateHeadRows(isCreateHeader);
        defaultExport(list, pojoClass, fileName, response, exportParams);
    }

    /**
     * excel 导出
     *
     * @param list      数据
     * @param title     标题
     * @param sheetName sheet名称
     * @param pojoClass pojo类型
     * @param fileName  文件名称
     * @param response
     */
    public static void exportExcel(List<?> list, String title, String sheetName, Class<?> pojoClass, String fileName, HttpServletResponse response) throws IOException {
        defaultExport(list, pojoClass, fileName, response, new ExportParams(title, sheetName, ExcelType.XSSF));
    }

    /**
     * excel 导出
     *
     * @param list         数据
     * @param pojoClass    pojo类型
     * @param fileName     文件名称
     * @param response
     * @param exportParams 导出参数
     */
    public static void exportExcel(List<?> list, Class<?> pojoClass, String fileName, ExportParams exportParams, HttpServletResponse response) throws IOException {
        defaultExport(list, pojoClass, fileName, response, exportParams);
    }

    /**
     * excel 导出
     *
     * @param list     数据
     * @param fileName 文件名称
     * @param response
     */
    public static void exportExcel(List<Map<String, Object>> list, String fileName, HttpServletResponse response) throws IOException {
        defaultExport(list, fileName, response);
    }

    /**
     * excel 导出本地文件
     *
     * @param list     数据
     * @param filePath
     * @throws IOException
     */
    public static void exportExcel(List<Map<String, Object>> list, String filePath) throws IOException {
        defaultExport(list, filePath);
    }

    private static void defaultExport(List<Map<String, Object>> list, String filePath) {
        File file = new File(filePath);
        FileOutputStream fileOutputStream = null;
        try {
            fileOutputStream = new FileOutputStream(file);
        } catch (FileNotFoundException e) {
            e.printStackTrace();
            return;
        }

        Workbook workbook = ExcelExportUtil.exportExcel(list, ExcelType.HSSF);
        try {
            workbook.write(fileOutputStream);
            workbook.close();
            fileOutputStream.close();
        } catch (IOException e) {
            e.printStackTrace();
        } finally {

        }
    }

    /**
     * 默认的 excel 导出
     *
     * @param list         数据
     * @param pojoClass    pojo类型
     * @param fileName     文件名称
     * @param response
     * @param exportParams 导出参数
     */
    private static void defaultExport(List<?> list, Class<?> pojoClass, String fileName, HttpServletResponse response, ExportParams exportParams) throws IOException {
        Workbook workbook = ExcelExportUtil.exportExcel(exportParams, pojoClass, list);
        downLoadExcel(fileName, response, workbook);
    }

    /**
     * 默认的 excel 导出
     *
     * @param list     数据
     * @param fileName 文件名称
     * @param response
     */
    private static void defaultExport(List<Map<String, Object>> list, String fileName, HttpServletResponse response) throws IOException {
        Workbook workbook = ExcelExportUtil.exportExcel(list, ExcelType.HSSF);
        downLoadExcel(fileName, response, workbook);
    }

    /**
     * 下载
     *
     * @param fileName 文件名称
     * @param response
     * @param workbook excel数据
     */
    public static void downLoadExcel(String fileName, HttpServletResponse response, Workbook workbook) throws IOException {
        if (fileName.contains(".")) {
            fileName = fileName.substring(0, fileName.lastIndexOf("."));
        }
        try {
            response.setCharacterEncoding("UTF-8");
            response.setHeader("content-Type", "application/vnd.ms-excel");
            response.setHeader("Access-Control-Expose-Headers", "Content-Disposition");
            response.setHeader("Content-Disposition", "attachment;filename=" + URLEncoder.encode(fileName + "." + ExcelTypeEnum.XLS.getValue(), "UTF-8"));
            workbook.write(response.getOutputStream());
        } catch (Exception e) {
            throw new IOException(e.getMessage());
        }
    }

    /**
     * excel 导入
     *
     * @param filePath   excel文件路径
     * @param titleRows  标题行
     * @param headerRows 表头行
     * @param pojoClass  pojo类型
     * @param <T>
     * @return
     */
    public static <T> List<T> importExcel(String filePath, Integer titleRows, Integer headerRows, Class<T> pojoClass) throws IOException {
        if (StringUtils.isBlank(filePath)) {
            return null;
        }
        ImportParams params = new ImportParams();
        params.setTitleRows(titleRows);
        params.setHeadRows(headerRows);
        params.setNeedSave(true);
        params.setSaveUrl("/excel/");
        try {
            return ExcelImportUtil.importExcel(new File(filePath), pojoClass, params);
        } catch (NoSuchElementException e) {
            throw new IOException("模板不能为空");
        } catch (Exception e) {
            throw new IOException(e.getMessage());
        }
    }

    /**
     * excel 导入
     *
     * @param file      excel文件
     * @param pojoClass pojo类型
     * @param <T>
     * @return
     */
    public static <T> List<T> importExcel(MultipartFile file, Class<T> pojoClass) throws IOException {
        return importExcel(file, 1, 1, pojoClass);
    }

    /**
     * excel 导入
     *
     * @param file       excel文件
     * @param titleRows  标题行
     * @param headerRows 表头行
     * @param pojoClass  pojo类型
     * @param <T>
     * @return
     */
    public static <T> List<T> importExcel(MultipartFile file, Integer titleRows, Integer headerRows, Class<T> pojoClass) throws IOException {
        return importExcel(file, titleRows, headerRows, false, pojoClass);
    }

    /**
     * excel 导入
     *
     * @param file       上传的文件
     * @param titleRows  标题行
     * @param headerRows 表头行
     * @param needVerfiy 是否检验excel内容
     * @param pojoClass  pojo类型
     * @param <T>
     * @return
     */
    public static <T> List<T> importExcel(MultipartFile file, Integer titleRows, Integer headerRows, boolean needVerfiy, Class<T> pojoClass) throws IOException {
        if (file == null) {
            return null;
        }
        try {
            return importExcel(file.getInputStream(), titleRows, headerRows, needVerfiy, pojoClass);
        } catch (Exception e) {
            throw new IOException(e.getMessage());
        }
    }

    /**
     * excel 导入
     *
     * @param inputStream 文件输入流
     * @param titleRows   标题行
     * @param headerRows  表头行
     * @param needVerfiy  是否检验excel内容
     * @param pojoClass   pojo类型
     * @param <T>
     * @return
     */
    public static <T> List<T> importExcel(InputStream inputStream, Integer titleRows, Integer headerRows, boolean needVerfiy, Class<T> pojoClass) throws IOException {
        if (inputStream == null) {
            return null;
        }
        ImportParams params = new ImportParams();
        params.setTitleRows(titleRows);
        params.setHeadRows(headerRows);
        params.setSaveUrl("/excel/");
        params.setNeedSave(true);
        params.setNeedVerify(needVerfiy);
        try {
            return ExcelImportUtil.importExcel(inputStream, pojoClass, params);
        } catch (NoSuchElementException e) {
            throw new IOException("excel文件不能为空");
        } catch (Exception e) {
            throw new IOException(e.getMessage());
        }
    }

    /**
     * excel 导出
     *
     * @param list         数据
     * @param pojoClass    pojo类型
     * @param fileName     文件名称
     * @param
     * @param exportParams 导出参数
     */
    public static void exportExcelToSave(List<?> list, Class<?> pojoClass, String fileName, ExportParams exportParams, String filePathTemp) throws IOException {
        exportToSave(list, pojoClass, fileName, exportParams, filePathTemp);
    }

    /**
     * 默认的 excel 导出
     *
     * @param list         数据
     * @param pojoClass    pojo类型
     * @param fileName     文件名称
     * @param
     * @param exportParams 导出参数
     */
    private static void exportToSave(List<?> list, Class<?> pojoClass, String fileName, ExportParams exportParams, String filePathTemp) throws IOException {
        Workbook workbook = ExcelExportUtil.exportExcel(exportParams, pojoClass, list);
        File file = new File(filePathTemp);
        if (!file.exists()) {
            file.mkdirs();
        }
        filePathTemp += File.separator + fileName;
        OutputStream outputStream = new FileOutputStream(filePathTemp);
        //先保存到临时路径，在通过文件上传的方法上传到正式路径
        workbook.write(outputStream);
        workbook.close();
    }

    /**
     * 导出返回二进制
     *
     * @param list
     * @param pojoClass
     * @param fileName     不需要加后缀 .xlsx
     * @param exportParams
     * @param response
     * @throws IOException
     */
    public static void exportOutPut(List<?> list, Class<?> pojoClass, String fileName, ExportParams exportParams, HttpServletResponse response) throws IOException {
        Workbook workbook = ExcelExportUtil.exportExcel(exportParams, pojoClass, list);
        workbook.getSheetAt(0).getPrintSetup().setLandscape(true);
        try {
            response.setCharacterEncoding("UTF-8");
            response.setHeader("content-Type", "application/vnd.ms-excel");
            response.setHeader("Access-Control-Expose-Headers", "Content-Disposition");
            response.setHeader("Content-Disposition", "attachment;filename=" + URLEncoder.encode(fileName + ".xlsx", "UTF-8"));
            workbook.write(response.getOutputStream());
        } catch (Exception e) {
            e.printStackTrace();
        }
    }


    //自定义表格 生成文件导出
    public static void exportUtils(XSSFWorkbook wxk, String sheetName, String filePathTemp, HttpServletResponse response) {
        try {
            response.setCharacterEncoding("UTF-8");
            response.setHeader("content-Type", "application/vnd.ms-excel");
            response.setHeader("Access-Control-Expose-Headers", "Content-Disposition");
            response.setHeader("Content-Disposition", "attachment;filename=" + URLEncoder.encode(sheetName + ".xlsx", "UTF-8"));
            wxk.write(response.getOutputStream());
        } catch (Exception e) {
            e.printStackTrace();
        }

//        OutputStream outputStream = null;
//        try {
//            outputStream = new FileOutputStream(filePathTemp + sheetName + ".xlsx");
//        } catch (FileNotFoundException e) {
//            e.printStackTrace();
//        }
//        try {
//            wxk.write(outputStream);
//        } catch (IOException e) {
//            e.printStackTrace();
//        } finally {
//            try {
//                wxk.close();
//            } catch (IOException e) {
//                e.printStackTrace();
//            }
//        }


    }


    /**
     * Excel 类型枚举
     */
    enum ExcelTypeEnum {
        XLS("xls"), XLSX("xlsx");
        private String value;

        ExcelTypeEnum(String value) {
            this.value = value;
        }

        public String getValue() {
            return value;
        }

        public void setValue(String value) {
            this.value = value;
        }
    }
}